I'll copy and paste one of my old answers that pertains specifically to Germany:

In 1938, the Temmler pharmaceutical company based in Berlin released a drug called Pervitin to the civilian population of Germany. Pervitin is another name for methamphetamine (in fact, in large parts of Eastern Europe, methamphetamine is still commonly referred to as Pervitin when in pill form).

Otto Ranke, head of the Military Medical Academy at the University of Berlin and member of the National Socialist Teacher's Association, tested the drug's performance enhancing abilities on university (volunteer) students, recommending it for use by the military. Even before this, Pervitin was being issued by medical officers without military order or procedure, especially in Poland and the occupation of Czechoslovakia. Ranke writes in 1940:

"According to the personal information of some officers, Pervitin was repeatedly used during the Poland campaign, even supplied by army physicians.

Dr. Grosselkeppler of the 30th infantry division writes:

"As the drug [Pervitin] was known to the medical officer due to its positive effects, it was bought before the Poland campaign. (...) The pills were distributed without comment. Owing to their remarkable effect, the troops came to know very soon what their purpose was."

Use was widely reported among Luftwaffe pilots (the tradition of giving pilots pharmaceuticals to stay awake is still around today). 36 million pills were sent to German soldiers in France alone.

Many field doctors noted some signs of addiction among soldiers issued Pervitin- longer recovery times, reduced effects, cardiac/respiratory problems. Ranke studied cases of usage of Pervitin in Poland and France during 1940 following reports of abuse by officers and medical officials, but there's evidence to believe that he purposely lied about his findings in order to diminish the problem in the eyes of the administration. In 1941 an amendment to the Opium Law of 1921 medicalized Pervitin for German citizens (possession was illegal without a prescription), but military use continued, with an additional warning about addiction issued to commanding officers handing out the pills to soldiers. I couldn't find any sources that cited examples of soldiers disobeying orders or creating unruly disruptions specifically due to Pervitin. In fact, quite the opposite- I quote an English translation of a letter from a field medic in 1942, during a retreat from the Red Army in freezing weather:

"In a 14-hour march without contact with the enemy, 25 km were covered in partially deep snow. (...) the snow sometimes being hip-deep, the nervousness (i.e. emotional agitation) of the men resulted in a pace that was too irregular and too rapid. When the ice of Lake Ilmen was reached, (...) many comrades showed signs of total exhaustion: staggering, a complete less of interest and willpower, pain and cramps in the leg muscles, the calves and groin especially, palpitation, pain in the chest, and nausea. Around midnight (6 hours after the retreat had started) some of the troops repeatedly tried to lie down in the snow, their willpower could not be aroused despite vehement encouragement. These men were given 2 pills of Pervitin each. After half an hour the first men confirmed their improved state of health. They were marching properly again, stayed in line, were more confident and took notices of their surroundings. The pain in the muscles was borne more easily. Some proved to be in a slightly euphoric mood. With only 180 pills at hand, the medicine could only be distributed to the seriously exhaused."

However, there are numerous documented examples of soldiers becoming addicted to Pervitin, most notably in the case of Heinrich Boell, who wrote several letters to his family from military training:

9th November, 1939: "Dear parents, brothers and sisters! [...] My duty is very strict, and you must understand when I write only every two or four days. Today I am mainly writing for Pervitin!" And as a P.S.: "Don't forget Pervitin [...] God punish England!"

20 May, 1940: "Perhaps you could provide me with some Pervitin for my supply?"

19 July, 1940, stationed in Poland: "I am tired to death and will now finish [this letter]. Send me, if possible, some Pervitin soon and [...] cigarettes; also a pair of underpants."

Some concerns about officer abuse during the campaign in France lead to an investigation. Ranke collected reports on personal usage of Pervitin from medical officers during his stay in France; of 20 asked, only 5 had not used Pervitin (humorously, at least to me, 8 of those asked had used Pervitin in order to drink more or stay longer at evening parties, or as a 'hangover cure'). At least two officers died of myocardial infarcations after ingesting Pervitin, and one tank commander suffered a heart attack after only taking one pill.

In general, it seems usage was relatively common, though not on an extreme scale. Though amphetamines can give weary soldiers energy, the addiction potential combined with likelihood of abuse and negative health effects dissuaded widespread issuance of pervitin to troops, with the most common usage being for exhausted pilots who may have to complete back to back 7-9 hour flights.

Source: Eckart, Wolfgang Uwe. Man, Medicine, and the State: The Human Body as an Object of Government. Franz Steiner Verlag, 2006, pg. 61-78.